c# - EMGU 2.4.0 BruteForceMatcher KNNMATCH 不工作？

Question

这是我的代码的快照，

Matrix<byte> mask;
int k = 2;
VectorOfKeyPoint modelKeyPoints;
VectorOfKeyPoint observedKeyPoints;
SURFDetector surfCPU = new SURFDetector(500, false);
modelKeyPoints = surfCPU.DetectKeyPointsRaw(modelImage, null);
Matrix<float> modelDescriptors = surfCPU.ComputeDescriptorsRaw(modelImage, null, modelKeyPoints);
observedKeyPoints = surfCPU.DetectKeyPointsRaw(observedImage, null);
Matrix<float> observedDescriptors = surfCPU.ComputeDescriptorsRaw(observedImage, null, observedKeyPoints);
BruteForceMatcher<float> matcher = new BruteForceMatcher<float>(DistanceType.L2);
matcher.Add(modelDescriptors);
indices = new Matrix<int>(observedDescriptors.Rows, k);
using (Matrix<float> dist = new Matrix<float>(observedDescriptors.Rows, k))
{
      matcher.KnnMatch(observedDescriptors, indices, dist, k, null);
}

我总是在 KnnMatch() 中得到以下异常

发生Emgu.CV.Util.CvException消息:OpenCV:queryDescriptors.type() == trainDescCollection[0].type()

我已经很努力地想摆脱这个异常，但没有希望:(

Answer 1

终于找到问题的原因了

它是 modelKeyPoints 或 observedKeyPoints 之一 null :)